GB/T 34105 Q245HB Seamless Steel Tubes for Ocean Engineering Structures, API 5L, EN 10025-3, EN 10210-1, EN 10210-2, Q245HB (B, BR, BN, BQ), Q245HC (B, BR, BN, BQ), Q245HD (B, BR, BN, BQ), Q290HB (X42, X42R, X42N, X42Q), Q290HC (X42, X42R, X42N, X42Q), Q290HD (X42, X42R, X42N, X42Q), Q320HB (X46, X46N, X46Q), Q320HC (X46, X46N, X46Q), Q320HD (X46, X46N, X46Q), Q320HE (X46, X46N, X46Q), Q320HF (X46, X46N, X46Q), Q345HB, Q345HC, Q345HD, Q345HE, Q345HF, Q360HB (X52, X52N, X52Q), Q360HC (X52, X52N, X52Q), Q360HD (X52, X52N, X52Q), Q360HE (X52, X52N, X52Q), Q360HF (X52, X52N, X52Q), Q390HB (X56, X56N, X56Q), Q390HC (X56, X56N, X56Q), Q390HD (X56, X56N, X56Q), Q390HE (X56, X56N, X56Q), Q390HF (X56, X56N, X56Q), Q415HB (X60, X60N, X60Q), Q415HC (X60, X60N, X60Q), Q415HD (X60, X60N, X60Q), Q415HE (X60, X60N, X60Q), Q415HF (X60, X60N, X60Q), Q450HC (X65Q), Q450HD (X65Q), Q450HE (X65Q), Q450HF (X65Q), Q485HC (X70Q), Q485HD (X70Q), Q485HE (X70Q), Q485HF (X70Q), Q555HC (X80Q), Q555HD (X80Q), Q555HE (X80Q), Q555HF (X80Q), Q625HC (X90Q), Q625HD (X90Q), Q625HE (X90Q), Q625HF (X90Q), Q690HC (X100Q), Q690HD (X100Q), Q690HE (X100Q), Q690HF (X100Q)

GB/T 34105 Seamless Steel Tubes for Ocean Engineering Structures

Standard: GB/T 34105
Equivalent Standards: API 5L, EN 10025-3, EN 10210-1, EN 10210-2

Material: Q245HB
Equivalent Materials: B, BR, BN, BQ

Chemistry Composition

C, %	Si, %	Mn, %	P, %	S, %	Cr, %	Ni, %	Cu, %
0.07-0.14	0.17-0.37	0.35-0.65	0.025 max	0.030 max	0.15 max	0.30 max	0.30 max

Mechanical Properties

Tensile Strength , MPa	Yield Strength, MPa	Elongation, %
343 min	206 min	24 min

Outside Diameter & Tolerance

Outside Diameter, mm	Tolerance, mm
5≤OD≤10	±0.15
10＜OD≤30	±0.30
30＜OD≤50	±0.40
OD>50	±0.8%

Wall thickness & Tolerance

Wall Thickness , mm	Tolerance, %
WT≤1	±0.12mm
1＜WT≤5	±10
WT>5	±8
1＜WT≤2.5, OD>110	±12.5

GB/T 34105 specifies the designation method, order content, size, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of seamless steel tubes for ocean engineering structures. GB/T 341056 is applicable to seamless steel tubes for ocean engineering structures.
GB/T 34105规定了海洋工程结构用无缝钢管的牌号表示方法、订货内容、尺寸、外形、重量、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 34105适用于海洋工程结构用无缝钢管。

Length: 4000mm; 8030mm; 8050mm; 12010mm; 12030mm; 12050mm; and so on.
Max length: 27000mm, also U bending can be offered.

Keyword: seamless steel pipe, seamless steel tube, GOST 8734-75, DIN 1629, EN 10216-1, ГОСТ 8734-75

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